Question

The circuit contains two diodes each with a forward resistance of 50 Ω and with infinite reverse resistance. If the battery voltage is 6 V, the current through the 120 Ω resistance is_ mA.

Answer 1

Answer is 20

In this circuit D₁ will be forward bias and D₂ will be revers bias.

 \(\therefore\) There will be no current through D₂ and R₂

 Apply KVL in circuit we get

+ 6 – 50i – 130i – 120i = 0